Can I model APIs? or simulate APIs?

Hi, I would like to know if there is any way to model an API, in order to simulate interactions for further API service implementation. My objective is to mockup everything previously move it to developers.

Regards

Hard to say what you want to accomplish without getting further context.

Do you want to mock things at run-time? Then this is not a bpmn-js / bpmn.io topic, but an engine topic, i.e. Camunda.